Sah, G., S. C. Shah, S. K. Sah, R. B. Thapa, A. McDonald, H. S. Sidhu, R. K. Gupta, B. P. Tripathi, and S. E. Justice. “Effects of Tillage and Crop Establishment Methods, Crop Residues, and Nitrogen Levels on Wheat Productivity, Energy-Savings and Greenhouse Gas Emission under Rice -Wheat Cropping System”. Nepal Journal of Science and Technology, vol. 15, no. 2, Feb. 2015, pp. 1-10, doi:10.3126/njst.v15i2.12104.